package test;

/**
 * @author oldliu
 * @since 1.0
 */
public class Zhishu {
    public static void main(String[] args) {
        int start=1;
        int k=0;
        while (start<10000000){
            start*=2;
            k=start-1;
            //判断k是不是质数
            System.out.println(k);

        }
    }
}
